Package for electronic components



Dec. 25, 1962 w. M. HENNESSEY 3,070,648

PACKAGE FOR ELECTRONIC COMPONENTS Filed Sept. 6, 1960 FIG.

I IO 24 /g INVENTOR. 57 48 4 36 WILLIAM MHENNESSEY ZMQ/aw ATTORNEYUnited States Patent Ofifice 3,070,648 Patented Dec. 25, 1962 3,d7tl,648PACKAGE FOR ELECTRONIC COMIQNENT William M. Henriessey, Rosiyn, Pa,assignor to Burroughs Corporation, Detroit, Mich., a corporation ofMichigan Filed Sept. 6, 1960, Ser. No. 54,232 4 Claims. (Cl. 17452) Thisinvention relates to the art of packaging small electronic componentsand particularly to a novel package for a pulse transformer.

A pulse transformer of the type contemplated by the present inventioncomprises a ring of magnetic material on which is wound a plurality ofelectrical windings. Generally, this assembly is mounted in a containerof plastic or metal with the leads to the windings projecting throughthe container. In some constructions, particularly those in which thecontainer comprises a thin-walled metallic tube, it is comparativelydifficult to provide a support arrangement for the transformer which isrugged, comparatively inexpensive, and simple in construction so that itis readily adapted to mass production operation.

Accordingly, the principles and objects of the present invention areconcerned with the provision of an improved package for a pulsetransformer, the package being characterized by its ruggedness,simplicity, and adaptability to mass production techniques.

Briefly, the package of the invention includes two identical insulatingsupport plates which are adapted to support the transformer and whichcarry electrical leads to which the transformer windings are connected.The plates are oriented with respect to each other so that they supportthe transformer rigidly within the container and the leads are carriedthereby so that they all extend from the container lying in the sameplane. The simplicity in the number of parts and their arrangementallows mass production assembly of the units.

The invention is described in greater detail by reference to the drawingwherein:

P16. 1 is a sectional view of the package of the invention;

PEG. 2 is an end View, partly in section, of the apparatus of FIG. 1;

PEG. 3 is an exploded perspective view of portions of the apparatus ofFIG. 1; and

FIG. 4 is an end view, partly in section, of the parts shown in FIG. 3when assembled.

The package it? of the invention includes an open-ended hollow metalliccylinder 12 having its ends closed by members 7.4 and M which comprisebodies 18 and 24], respectively, of a suitable insulating material, eachhaving a metal ring 22, 2 3 secured to its periphery. The members i4 and16 are adapted to form a tight fit with the open ends of cylinder 12and, preferably, are positioned inside the cylinder. Thus, in thepreferred arrangement, the members 14 and id have substantially the samediameter as the inside diameter of cylinder 12, and in the completedpackage are sealed thereto by soldering, welding, or in any othersuitable fashion. Each end piece 13, 2t carries two metallic sleeves 26,28 adapted to receive lead wires.

The pulse transformer is mounted within the cylinder on a support whichincludes two identical thin T-shaped core-support members 36 and 3d of asuitable synthetic resinous insulating material. Since the supportmembers are identical, only member 3% is described in detail, and thecorresponding parts carry the same reference numerals, the numeralsassociated with member 30' being primed. identical apparatus secured tothe two support members are similarly identified. The core supportmember 30 includes a base 34 and a cross arm 36, with the base having aslot 38 which extends along the greater portion of its length. Thesupport member 30' includes a base 34' and a cross arm 36, with the basehaving a slot 38' which extends along the greater portion of its length.The cross arms are substantially as long as the internal diameter of thetube in which the transformer assembly is mounted.

The cross arm 36 of the first T member 30 is provided with two apertures46 and 48 aligned with the longitudinal axis of the cross arm, and metaleyelets 50 and 52 are secured thereto, one in each aperture. A firstmetallic lead 54, secured in the eyelet 56 by soldering or the like,extends vertically a short distance from the surface 55 of the cross armand is then bent perpendicularly so that it extends rearwardly away fromthe cross arm and away from the base. A similar lead 56, secured bysoldering or the like to eyelet 54, extends vertically from the oppositesurface 5'7 of the cross arm, bends perpendicularly, and extendsrearwardly in the same direction as the lead 54 and parallel thereto.The leads 54 and 56 thus lie spaced apart and parallel to each other,and a plane which includes both leads is disposed at a 45 angle to theplane of the T member 30.

The T member 36 is similarly constructed and includes identical leads54' and 5a which also lie in a plane which is disposed at a 45 angle tothe plane of T member 39.

A pulse transformer tit packaged according to the invention includes amagnetic core 62 on which, as shown, two sets of windings are provided,one winding having ends 64 and as and the other having ends 68 and 70.In assembling the package of the invention, the two T-shaped supportmembers 3% and 3%) are positioned at a angle to each other and the bases34 and 34- are threaded through the central aperture of the core of thepulse transformer. The bases 34 and 34' are interlocked by means oftheir slots, and they are brought together until each cross arm 36 and36 bears against the core. As shown in PG. 1, the base members 34 and34' are of sufficient length so that each engages and extends acrosssubstan tially the entire width of the cross arm of the other supportmember. Thus, base member 34 engages cross arm 36', and base member 34'engages cross arm 36. In addition, the slots 38 and 38' are sufficientlynarrow so that a tight fit is formed between each base member and thecross member which it engages. Thus, the two T members are lockedsecurely in position with the transformer held securely between members36 and 36'. When thus locked together, the leads 54, 5t), 54, 56 all liein the same plane, and this plane lies at a 45 angle to both supportmembers. The ends 64 and 66 of one winding are soldered to lead wires 54and 5e, and the ends 63 and "70 of the other winding are soldered tolead wires 54' and 56.

Next, end plate 15 is threaded on lead wires 54 and 56, and the assemblyis placed within the cylinder. The end plate in is then soldered orotherwise secured to the cylinder 12. through its metal ring 24. Theassembly of transformer 6t? and support members 30 and 34) thus mountedin the cylinder forms a tight fit with the cylinder since the cross arms36 and 36' have a length substantially equal to the inside diameter ofthe cylinder. The cylinder is filled with a suitable potting materialsuch as an epoxy resin, and the end plate 14 is threaded on leads 54-and 5d. The end plate 14 is sealed to the cylinder 12 through its ring22 by soldering or the like, and a compact, rugged assembly iscompleted.

It is not essential that the cylinder be filled with a potting material.if the spotting material is omitted, then the cylinder may be of such alength that the end plates 14 and 16 bear against the cross members 36and 36. Thus, a smaller package with optimum ruggedness is provided. Thepackage may also be vacuum-sealed if desired.

It is clear that the principles of the invention apply to the packagingof any type of electronic component, not necesarily a pulse transformer.In addition, many mechanical modifications may be made within the scopeof the invention. For example, the enclosing cylinder need not becircular in cross-section but may have other shapes.

What is claimed is:

1. A package for electronic apparatus including an enclosing containerhaving first and second ends, first and second identical T-shapedsupport plates coupled together at a 90 angle with respect to eachother, each support plate including a cross arm and a base member, thebase members being slotted longitudinally so that the support plates canbe threaded on each other with the base member of one support memberengaging and forming a tight iit with the cross arm of the other supportplate, an annular electronic device threaded on the base members of saidsupport plates with said cross arms bearing against said annular deviceand securing it in position, a first pair of lead wires carried by saiddevice and secured to said first plate with the members of the pairlying on opposite sides of said first plate and extending through saidfirst end of said container, at second pair of lead Wires carried bysaid device and secured to said second plate With the members of thesecond pair lying on opposite sides of the second plate and extendingthrough said second end of said container, said first and second pairsof lead wires lying in the same plane, and means, sealing said first andsecond ends of said container.

2. The package defined in claim 1 wherein the pairs of leads are securedto corresponding portions of each T-shaped support plate.

3. The package defined in claim 1 wherein each pair of leads is securedto the cross arm of its support plate.

4. The package defined in claim 1 wherein the leads of each of leads lieparallel to each other on opposite sides of its support plate,corresponding leads being secured to corresponding portions of thesupport plates and having corresponding physical orientation so that thesupport plates and the leads carried thereby are identical.

References in the file of this patent UNITED STATES PATENTS 2,428,826Bauer Oct. 14, 1947 2,527,819 Ianney Oct. 31, 1950 2,623,101 Kurland etal. Dec. 23, 1952 2,787,767 Goldsmith Apr. 2, 1957

